My girlfriend and I would like to get married in canada and we are both gay and I would like to know if a court house can marry us or how we do it where do we go?

Please read below:
Same-sex marriage in Canada - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/Same-sex_marriage_in_Canada)

And Congratulations!

So you get married in Canada. Do you both reside in Canada? Will your marriage be recognized in the state you both reside in (if living in the United States)?

I congratulate you both on making this commitment. Good luck to you both.

It will not be reconised in the US states that do not allow gay marriage ( or those that have laws specificly against it)